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Two-body correlations in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>8</mml:mn><mml:mn /></mml:math>and 10 nuclei and effective neutron-neutron interactions in Tamm-Dancoff and two-particle random phase approximation models
We apply a particle-particle random phase approximation (RPA) model to study the properties of the two-neutron valence wave function in nuclei ${}^{14}\mathrm{C},$ ${}^{12}\mathrm{Be},$ ${}^{11}\mathrm{Li},$ and ${}^{14}\mathrm{Be}.$ The RPA model takes account of two-body correlations in the cores so that it gives a better description of energies and amplitudes than models …